Here are a couple of the needs and wants lesson plans, worksheets, and printables I found using Search PlanIt.
That's not what that article is about
It's about modeling conformational changes in le bonds can rotate--that's the "torsion" they are referring to.
What they seem to be trying to get at is the famous "Protein Folding Problem."Proteins are created one amino acid at a time and each a.a can have a positive or negative charge making it either sticky or repulsive to other amino mainly is what gives proteins there three dimensional shape or "secondary structure."
The is that there are many secondary structures a protein can have--so how does it end up folding into just the right functional shape?